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e. ATV or snow machine
<br />f. Snow -cat or similar equipment, as needed for snow plowing
<br />7. Crew Size:
<br />a. 10 -hour day
<br />b. Approximately 10 crew members
<br />8. The proposed survey consists of 5 seismic lines totaling approximately 37,600 feet in length
<br />9. A group of 4 geophones (2 -inch square plastic molded sensor with a 3 -inch long metal spike protruding
<br />from the bottom) spaced approximately 18 feet apart is placed every 82 feet along the receiver lines and
<br />connected by cables
<br />10. The source truck moves along the survey line, and "thumps" every 82 feet, about 4 — 6 times per location
<br />11. At a location proximate to the survey line, the recording trailer is parked and the data recorded on and
<br />displayed by a computer when the weight -drop source truck is activated
<br />12. After the seismic survey activities are completed and recorded, a crew recovers the geophones, cables, and
<br />any flag markers
<br />Maps and additional details for the seismic survey project are provided in Exhibit 52.
<br />WCR Coal Coreholes (MR13-269, MR13-272, MR14-275, MR14-276, MR14-277, MR14-278, MR14-279,
<br />MR14-280, MR14-281)
<br />TC proposes to develop access, construct drill -pads, and drill and log up to 49 coreholes in the Eastern Mining
<br />District (EMD) and Northern Mining District (NMD). The purpose of the corehole program is to more accurately
<br />define the extent, configuration, and quality of the Wolf Creek Reserve (WCR) and associated geology and
<br />partings, and to assess overburden and coal physical and chemical characteristics, for planning and implementation
<br />of possible future mining operations in this area. The proposed activities will occur on lands, and will affect
<br />surface and minerals owned or controlled by TC, and will be conducted during the fall through summer of 201
<br />through 2015, with some activities potentially extending into fall 2015, as shown on Figures EX52-F1, EX52-F2,
<br />EX52-173, EX52-F4, EX52-F5, EX52-176, and EX52-177, WCR Coal Coreholes. Environmental baseline studies,
<br />including Cultural resource survey, and wildlife consultation with Colorado Parks and Wildlife, have been
<br />completed for the proposed drill -sites, and are documented by cultural resource survey reports (Exhibit 6L), and
<br />wildlife consultation letters.
<br />Drill -sites have been selected and located to facilitate access from existing County, mine, and ranch roads, and to
<br />avoid stream buffer zones and any cultural resource exclusion areas. Minor maintenance may be required for
<br />portions of the existing roads, including grading to address rills or washouts and placement of suitable road -base
<br />materials or rock/gravel, to assure good access during any wet conditions and minimize any road damage. Where
<br />direct access from existing roads is not feasible, drilling equipment and supplies may travel overland short distances
<br />during periods when ground conditions are favorable to access the drill sites, or short temporary connecting roads
<br />will be constructed. Where road maintenance or construction involves any significant new disturbance, soil
<br />materials will be recovered and stockpiled for later use in reclamation, as appropriate. The maximum anticipated
<br />road maintenance/construction disturbance requirements would be approximately 38,800 feet (22.3 acres with a 25
<br />ft. maximum road disturbance width).
<br />Drill pads will range from approximately 75 x 75 feet (0.15 acres) to 250 x 250 feet ( 1.43 acres) depending on
<br />drilling conditions. with soil material stripping limited to an area around the drillhole collar. and the area
<br />surrounding any mud pits necessary to support drilling operations. in order to minimize disturbance and facilitate
<br />site reclamation. it additional site work is required to establish a level pad, any aftected areas will be stripped and
<br />the soil material stockpiled for use in reclaiming the site. Wattles, sediment fence, and/or berms will be used to
<br />control site drainage and prevent off-site sediment transport, with drainage and sediment control for the associated
<br />disturbance being address as Small Area, Exemptions (SAE'S). Nominal 4.805 -inch to 10.750 -inch drillholes will
<br />be completed using rotary drilling methods and drilling mud as the circulation medium, to depths ranging from 800
<br />to 1,800 feet. Any drilling fluids will be fully contained on site using either mud pits or temporary porta-pits. Core
<br />samples will be recovered from all drillholes, and all drillholes will be geophysically logged.
<br />PR15-111 2.05-17.3 17/06/15
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